The Washer,key, cataloged under National Stock Number 5310-01-131-2948, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-131-2948 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Treatment Document and Classification | PS 13001,TYPE 1,FSCM 81873 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| External Prebent Key Length | 0.050 INCHES NOMINAL IN |
| Overall Distance Including Keys | 0.580 INCHES NOMINAL IN |
| Material Document and Classification | MIL-S-6721 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.370 INCHES NOMINAL IN |
| Material Thickness | 0.020 INCHES NOMINAL IN |
| External Key Quantity | 7 |
| External Prebent Key Angle | 18.0 DEGREES MINIMUM AND 22.0 DEGREES MAXIMUM |
| Surface Treatment | PASSIVATE OVERALL |
| External Prebent Key Width | 0.100 INCHES NOMINAL IN |
| Material | STEEL COMP 321 OVERALL |
| Hole Diameter | 0.200 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 41003566 | 3/2 Design control — primary reference U.S. Government activity |
| 10109597 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 5310-01-131-2948 is a Washer,key, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-131-2948: Surface Treatment Document and Classification: PS 13001,TYPE 1,FSCM 81873 MFR REF SINGLE TREATMENT RESPONSE OVERALL; External Prebent Key Length: 0.050 INCHES NOMINAL IN; Overall Distance Including Keys: 0.580 INCHES NOMINAL IN; Material Document and Classification: MIL-S-6721 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL. 12 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.